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Article ? AI-assigned paper type based on the abstract. Classification may not be perfect — flag errors using the feedback button. Tier 2 ? Original research — experimental, observational, or case-control study. Direct primary evidence. Environmental Sources Food & Water Human Health Effects Marine & Wildlife Nanoplastics Sign in to save

Health and Environmental Impact of Microplastics

2025
Aditya Kumar Sharma, Surya Prakash Gautam, Nabin Chaulagain, Charalampos Proestos, Niranjan Koirala

Summary

This chapter examined the health and environmental impacts of microplastics (under 5 mm) and nanoplastics (1–1000 nm), reviewing their primary and secondary sources, distribution pathways, mechanisms of harm to organisms and ecosystems, and strategies for reducing human exposure.

Study Type Environmental

Microplastics are plastic particles with a diameter of less than 5 mm, while nanoplastics range from 1 to 100 or even 1000 nm (in diameter), which have gained special attention due to their potential environmental as well as health impacts. This study provides an examination of the impact of microplastics on health and the environment. Along with that the study aims to highlight the various sources, distribution patterns, pathways, mechanisms, pollution of microplastics, and protective measures. Primary and secondary microplastics are the source and type of microplastics. The primary kinds of microplastics are minute fragments made for industrial purposes, such as microfibers and cosmetics shed from cloth, including nets used for fishing and garments. Secondary microplastics are fragments left over when larger plastic objects, such as plastic bottles and bags, break down. Microplastics (MPs) are typically found in a variety of environmental components, including soil, rivers, lakes, the ocean, and even the atmosphere. However, industrial waste, along with the decomposition of macroplastics and the disposal of consumer goods, is what produces MPs, which are found in every environmental sector as well as in drinking water. Microplastics have been found in tap water also. Furthermore, the surfaces of minute plastic particles may harbor pathogens and act as a vehicle for the spread of environmental diseases. Microplastics may mix with soil organisms to affect their health as well as the soil’s overall performance. Microplastics are a pollutant that ecotoxicologists are becoming more concerned about for both human health and aquatic habitats. Although contamination with microplastic is pervasive in the air, land and water, these habitats are typically thought of separately although they are interconnected.

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